People who live between the Spokane River valley and the Idaho lakes treat the whole corridor as home turf. Someone in Post Falls will drive to Spokane Valley for a contractor, and a family in Nine Mile Falls will book a dentist downtown if the reviews look solid. Google reads that behavior and often shows results from both sides of the border for the same query, which means your competition is wider than a quick look at Spokane listings suggests.
Two counties, two sets of search habits
Residents of Spokane County tend to search by neighborhood (Browne's Addition, Perry District, Northpointe), while people in Kootenai County lean on town names like Hayden or Rathdrum. A site that only says "Spokane" in its titles quietly gives up the second group. Mapping which towns you truly serve, then building content for them without padding, is the first real decision.
Seasons change the queries
Snow removal, furnace repair and ski rentals spike when the first cold snap hits Mount Spokane, while lake services, landscaping and roofing climb in spring. Publishing seasonal pages a few weeks ahead of the curve lets Google crawl and settle them before your customers start typing.